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4438

Originally Posted by Ralf

....with two 2242H, one 2234H and the 2344A/2426...

Hi Ralf,

nice idea.....but what's the job for the 2234? When crossing the woofer section to the 2344 with about 1 kHz, for my opinion the problem may be the 800 - 1kHz. I would prefer a 10" or 12" for the lower mids, with less cone distortion in this frequency area... think about to use a 2441 with a good horn and try to set the crossover frequency to the woofers to 700-800 Hz. An additional 2405 maybe also give a fine and "crispy" sound.

(only my "1 cent")

HP

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nice idea.....but what's the job for the 2234? When crossing the woofer section to the 2344 with about 1 kHz, for my opinion the problem may be the 800 - 1kHz. I would prefer a 10" or 12" for the lower mids, with less cone distortion in this frequency area... think about to use a 2441 with a good horn and try to set the crossover frequency to the woofers to 700-800 Hz. An additional 2405 maybe also give a fine and "crispy" sound.

(only my "1 cent")

HP

Hi Hans-Peter,

I would cut off the both 2242 at 100 Hz or less. So it makes sense with an additional driver for the lower mids. Why you thing it`s a problem to cut the 2234H at 1k? it`s the same situation as in your 4435...

I'm currently waiting for an adapter so I can measure the P Audio pseudo clone of the 2344 with a 2426H and should have results in about a week. I'll simulate a modified 4430 crossover to use it with my 2234H and I can post a schematic. The 2451 has a 1.5" throat so any of the horns used with the 2430 could be used with this driver. You can get a 2381 or 2383 horn directly from JBL to use with this driver http://www.jblproservice.com/pdf/Hor...%20List%20.pdf but it does not have response all the way to 20kHz. You would probably want to add a supertweeter above 10kHz. I also know where you can buy some barely used 2451s for $450.

4438

for my opinion the 2234 in your first assy has not very much to do in the frequency range it is built for and the 2123 can handle the lower mids a lot better. Congratulations for your decision to take an additional 2405 (in this frequency range also the 4435 needs assistance)

HP

(PS: next weekend (sat 7:00pm and sun from 2:00pm )we celebrate a small xmas fest in my garage, opened for all to come .....if you like, ...and please tell it to Guido)

Please help us save more info about the vintage systems. Let us register your speakers and drivers.

I, too, am hoping Tim will find opportunity to try the 2344A clone with a 1.5" driver like the 2451 suggested. Does it provide any VHF extension?

It is, indeed, 1.5", but adapts down to 1" for 2426.

I KNOW y'all like the 2405 for UHF, but 2404 would be a better match for 2344 mids, no? The one occasion I have seen 4435 "enhanced" with a supplemental UHF drivers, that's what was used....

Hi zilch,

look at my avatar. I tested both the 2405 and the 2404 with 2344/2426J and what you think is inside now?
Right! The 2405. It has the "crispy" (HP`s definition) sound and that is what I prefer. But everybody has an other taste...

For the mid bass: this is the most important part of the system. I use the 2206 in my blue tops for party employment because I wanted most power compression. But in this system we need a driver which is more linear...

If it was my project, I'd focus on upgrading all the chosen cone drivers to JBLs' 1/2" deep-gap types. To my ears they offer "truer and tighter" resolution .

The challenge if you go this route will be to design in circuit compensations to deal with the typically "rising" frequency response curves that these newer drivers have . It's a hassle - but I believe it's well worth the effort .

I prefer 10" drivers over 12(s) so that would have me chosing the 2012H or the 2251j. I usually match 1, 18" to a 10" or 12" to give you an idea of how many components I might be looking at .

For my ears, this much "paper down below" might excuse the 3" diaphragm, for a substitution by the 4" driver and its' extra midrange resolution. . Yes, a tweeter of some sort would be required . This would end up being more of an evolution of a higher resolution 4-way ( 4345 ), rather than a build up of a super 2.5 way, ( such as the 4435 ) .

In my opinion , it's all about matching the subjective resolutions of the various components .

To keep things current, I think you'll find lower distortion in the 2012H than the 2123H, (I've also heard it rumored that the 2123H curve is not as flat as published), and maybe the 2332 horn with the 2451H driver?